Transporting and dumping equipment



April 4, 1961 B. D. CHAMBERS TRANSPORTING AND DUMPING EQUIPMENT 2Sheets-Sheet 1 Filed Aug. 19, 1957 INVENTOR 0. MIVIZEEIQS ATTORNEYSApril 4, 1961 B. D. CHAMBERS TRANSPORTING AND DUMPING EQUIPMENT 2Sheets-Sheet 2 Filed Aug. 19, 1957 INVENTOR aurz. a. axflmaflas,

M Imam;

ATTORNEYS 2,918,126., I LTRANSPORTING AND DUMPING EQUIPMENT Bur-1D,Chambers, Knoxville, 'ienrn, assignor to Demp- 1 invention relates toimprovements in transporting and dumping equipment, and moreparticularly to such equipment as is used for picking up, transportingand dumping separate containers which are filled with refuse and othermaterials. j v 7 Pork trucks have been used heretofore for handling suchcontainers, an example of which is set forth in the patent applicationof George R. Dempster et al., Serial No. 544,177, filed November 1, 1955Such fork trucks have been'moresuccessful with containers-of'the dropbottom type, although these have been used also for containers of thetilt-type of :the character set forth in the patent of George R.Dempster, No; 2,281,183, granted April 28, 1942. a 1 v Such tilt-typecontainers usuallyareconstructed with A lifting pins atoppositeendsithereof and frequentlyhave a bail. connected with the lower rearportion ofthe con- I tainer, pivoted thereto and extendingsomewhatupri'ght. When a fork truck is moved intoengagement with atilttype container of the character mentioned, the forks straddle thecontainer under the lifting pins and, upon being movedupward,.rtheseforkslift the container to an elevated position andtransport the same to a point of dumping. It has been thepracticehereto-fore torprovide a dumping hook on the hoisting mechanism inposition for engagement with the bail, so that upon relative separationvertically of thedumping hookand lifting arms, the container is free torotate on the lifting pins supported by the arms, to discharge thecontents therefrom.

This rotary movement may be accomplished mechanically by an upwardpulling action applied. to the bail or by lowering the arms relativethereto, as described more in detail in the aforesaid Dempster patentand application.

It is desirable with tilt-type containers to connect the bail pivotallywith the bottom of the container forwardly of the back wall thereof;However, difiiculty has been encountered in the dumping procedure, dueto the fact that the container will not automatically be restored to itsupright position on the fork arms, but must be lowered to the grounduntil the lip on the container can be dragged by the truck as theshuttle is lowered to revolve the container to an upright position.

One object of this invention is to overcome this objection and toimprove the dumping procedure involved in dumping a tilt-type containerwhich has a bail pivoted to the bottom portion thereof.

Another object of the invention is to improve the construction oftransporting and dumping equipment using a fork truck and a tilt-typecontainerby providing for the effective dumping of the contents from thecontainer in an elevated position on the arms of the fork truck andwherein the container willbe restored automatically to an uprightposition. on the arms without the necessity for lowering the shuttle. p1

Still another object of .the invention is to improve the construction ofa container havingvabail pivotally: connected with the bottom thereof toprovide for. the proper control of the container during the dumpingprocedure, in

, 2 1 cooperation with a pair of dumping hooks on the car riage engagedwith the bail at the same time, so as to prevent outward swingingmovement of the bail during the dumping action. 1

One embodiment of the invention includes a tilt-type container having abail. extending upright from a point of pivotal connection with thebottom portion of the container and having vertically spaced points ofconnection with two separate hooks on the hoisting means engagedsimultaneously so that upon dumping of the container the latter will berestored automatically to its upright position by the Weight of thecontainer swinging on the lifting pins carried by the fork arms. In thisway, better control is maintained over the dumping of the container andthe latter can-be restored automatically and readily to its normalupright position, without the necessity for lowering thecontainer to theground.

This embodiment of the invention is illustrated in the accompanyingdrawings, in which: I Fig.1 is a sideelevation of the transporting anddumping equipment and illustrating the parts in different positi n v r vFig. 2 is an enlarged detail view of a portion of the container indumping position and with the bail connected with dumping hooks;

Fig. 3 is an elevation of one of the bails with a connected portion ofthe container; and i Fig. 4 is a view at right angles thereto of saidbail.

O The invention is shown, for purpose of illustration, asv applied to afork truck for handling and dumping separate containers, in the mannergenerally described in the application of George R. Dempster et al.,Serial No. 544,177, filed November 1, 1955, and using a tilt-typecontainer of the character set forth in the patent of George R.Dempster, No. 2,281,183, granted April 28, 1942.

As set forth in the aforesaid patent application, the fork truckincludes a suitable transport vehicle, preferably self-propelled andhaving one or more sets of steering wheels for controlling the directionof the vehicle. A motor vehicle chassis of this type is designatedgenerally by the numeral 1, supported on ground engaging wheels 2 andoperated by a suitable source of power under the control of an operatorwho is usually located within a cab or enclosure 3. I

Mounted at one end of the frame of the chassis 1 and extending uprighttherefrom is a pair of upright guides 4, which may be channels or thelike and form a suitable upright track. The guides 4 usually arepivotally supported at their lower ends on the chassis 1 and are capableof swinging movement in a forward and rearward di rection relative tothe chassis 1 under control of suitable power means, such as a hydraulicpower device 4, that connects the track 4 with the chassis 1.

Operatively mounted in the track 4'is a carriage 5 capable of raisingand lowering movement with respect to the track from a positionsubstantially at or adjacent the ground level to an elevated dumpingposition, as shown in full lines in 'Fig. 1'. The carriage 5 supports apair of fork arms 6, spaced apart at op osite sides of the vehicle insuch position with respect thereto so as to receive the containerbetween these fork arms. Any suitable means may be used for raising andlowering the carriage 5, such, for example, as the hydraulic hoistsdescribed in the aforesaid patent application of George R. Dempster etal., or the use of chains or other lifting means employed in connectiontherewith in a manner well understood in the art of fork trucks.

Also mounted on the carriage 5 is an elevator section, generallyindicated at 7, capable of raising and lowering I movements with respectto the carriage, as described ,in

the aforesaid patent application of George R. Dempster,

Patented Apr. 4, 196 1 under control of suitable means, such ashydraulic hoists. Mounted on the elevator section 7 at vertically spacedpoints are upper and lower dumping hooks 8, pivotally supported at 9 onthe elevator section 7 and extending downwardly and outwardly relativeto said section. Each of the dumping hooks '8 includes a throat 10 toreceive a portion of a bail therein, with a shuttle 11 pivotallysupported on the body of the dumping hook 8 in position for closing overthe bail and confining it to the throat 10.

A tilt-type container is indicated at 12, being of conventional form,such as disclosed in the aforesaid Dempster patent, No. 2,281,183,usually having an open top and enclosed lower portion and being adaptedto discharge the contents therefrom by an upside down turning action ofthe container. Lifting pins 13 secured rigidly to opposite ends of thecontainer may be engaged by the fork arms 6 for supporting the containerduring transportation and for dumping. The lifting pins 13 usually arelocated eccentrically with respect to the center of gravity of the bodyportion of the container 12 to permit rotation of the container fordumping and also permitting the container to be turned back to anupright position after dumping.

A bail is provided on the container 12, as indicated generally at 14.The bail 14 includes a pair of side bars 15, each of which is somewhatL-shaped with the short arms thereof extending underneath the lowerportion of the container and hinged to the bottom thereof at 16. Arecess may be provided, if desired, in the back portion of thecontainer, as indicated at 17, to receive the bail 14 therein, althoughsuch a recess is not essential and the bail may be located entirelyoutside the rear wall of the container rather than indented therein. Theside members 14 of the bail are connected together by cross bars 18which extend between the spaced side members 15 and may be welded orsecured otherwise thereto. These cross bars 18 should be spaced apartdistances corresponding with the spacing of the respective hooks 8 so asto enter the throats 10 in the hooks simultaneously and thereby connectthe container with the elevator section 7 of the carriage at verticallyspaced points along the length of the bail 14. A brace plate is shown at19 extending along the upper surface of the lower bar 18 and arrangedtangent to a circle around the center axis of said bar, rather thandirectly extending toward the center axis, so as to provide a maximumspace for engagement of the throat of the lower hook 8 with the bar andyet to reinforce the bar at that point. Gusset plates are shown at 20adjacent the ends of the upper cross bar 18 for reinforcing the pointsof connection of said bar with the side members 15 of the bail.

An additional cross bar may be provided, if desired, between the sidemembers 15 of the bail, as indicated at 21. Such additional cross barwould aid in bracing the side members and may be required for extraheavy loads, although such additional bracing bar may be omitted if notrequired.

In a manner well understood with equipment of this general type, it isthe practice for the container 12 to be filled with refuse or othersuitable material, separate and apart from its mounting on the hoistingunit. When it is desired to transport the container to a suitabledumping point, the vehicle is moved into supporting engagement with thecontainer. With the fork arms 6 lowered to positions underlying thelifting pins 13 when the container is sitting on the ground or othersuitable support, the hoisting means is operated to raise the carriageand thereby lift the container to a suitable height above the ground fortransportation to the desired point of dumping.

With the container 12 raised to a desired elevation at the dumpingposition, the cross bars 18 of the bail 14 are moved into the throats ofthe dumping hooks 8, thereby engaging both dumping hooks simultaneouslywith the bail 14. Then, upon relative action imparted to the elevatorsection 7 with respect to the carriage 5, the bail 14 will impart anupward pulling action on the bottom of the container so as to rotate thelatter on the fork arms 6 4 1 around the axis of the lifting pins 13.This will turn the container upside down for discharging the contentstherefrom. At the same time, due to the simultaneous engagement of bothdumping hooks 8 with the bail 14 at the vertically spaced points of thecross bars 18, the bail will be held in parallel relation with thecarriage, thus preventing the bail from swinging out, thereby allowingthe container to move away from the carriage in an uncontrolledcondition. Thus, after the dumping action, the operation of the liftingmeans connected with the elevator section 7 will cause a reaction of theelevator section with respect to the carriage 5 which will cause thecontainer to revolve about the axis of the lifting pins 13 resting onthe fork arms 6, thereby restoring the container to its upright positionsupported on the fork arms. This enables the container to be transportedto a desired point of refilling, without the necessity for lowering thecontainer into engagernent with the ground, but the container isrestored automatically through the action of the mechanism of thehoisting means to its normal upright position at the completion of thedumping cycle.

While the invention has been illustrated and described in oneembodiment, it is recognized that other variations and changes may bemade therein without departing from the invention, as set forth in theclaims.

I claim:

1. In transporting and dumping equipment, the combination with acontainer having a bottom, opposite end and side walls, lifting pinsconnected with the opposite end walls, a bail pivotally connected withthe bottom and extending substantially in upright position relative tothe back portion of the container, of a hoisting device including forkarms in positions to engage under the lifting pins for supporting thecontainer during transportation and dumping, and dumping hooks supportedon the hoisting device at vertically spaced points thereon respectivelyengaging the bail to hold the bail against swinging movement relative tothe hoisting device upon dumping movement of the container.

2. In transporting and dumping equipment, the com bination with acontainer having a bottom, opposite end and side walls, lifting pinsconnected with the opposite end walls, a bail pivotally connected withthe bottom and extending substantially in upright position relative tothe back portion of the container, of a hoisting device including forkarms in positions to engage under the lifting pins for supporting thecontainer during transportation and dumping, an elevator section movablymounted on the hoisting device for raising and lowering movementrelative to the fork arms, hooks mounted on the elevator section atvertically spaced points thereon, and means on the bail spaced tocorrespond with the spacing of the hooks in positions for simultaneousengagement with the hooks to hold the bail against outward swingingmovement during dumping of the container.

3. A container having a bottom and end and side walls, means connectedwith the end walls for supporting the container for transportation andfor dumping, a bail extending substantially in upright position relativeto and adjacent one side wall, means hingedly connecting the lowerportion of the bail with the bottom portion of the container, said bailhaving at least two vertically spaced cross bars connected therewith andextending horizontally in position for respective simultaneousengagement with dumping hooks on a hoisting unit.

4. In transporting and dumping equipment, the combination with acontainer having a bottom and surrounding walls, of a hoisting devicehaving a vertically movable carriage with arm means for connection withthe container to support the container on the carriage fortransportation and for dumping, an upright bail structure connected withthe container at the lower portion thereof, and means movable withrespect to the, armmeans on the hoisting device at vertically spacedpoints for simultaneous detachable latching engagement with the bailstructure for tilting the container and for holding the container inposition on the hoisting device during dumping.

5. In transporting and dumping equipment, the combination with acontainer having a bottom and surrounding Walls, of a hoisting devicehaving a vertically movable carriage with arm means for connection withthe container to support the container on the carriage fortransportation and for dumping, an upright bail structure pivotallyconnected with the container at the lower portion thereof, and meansmovable with respect to the arm means onthe hoisting device atvertically spaced points for simultaneous detachable latching engagementwith the bail structure for tilting the container and for holding thecontainer in position on the hoisting device during dumping.

6. In transporting and dumping equipment, thecombination with acontainer having a bottom and surroundink walls, of a hoisting devicehaving a vetrically movable carriage with arm means for connection withthe container to support the container on the carriage for trans?portation and for dumping, an upright bail structure connected with thecontainer at the lower portion'thereof, and means movable with respectto the arm means on the for simultaneous detachable latching engagementwith the bail structure for tilting the container and for holding thecontainer in position on the hoisting device during dumpmg.

,7. In transporting and dumping equipment, the combination with acontainer having a bottom and surrounding walls, of a hoisting devicehaving means for connection with the container to support the containerthereon for transportation and for dumping, an upright bail structureconnected with the container at the lower portion thereof, and havingcross bars thereon at vertically spaced points, and dumping hooks on thehoisting device spaced apart corresponding with the spacing of the crossbars and hoisting device at vertically aligned and spaced points 7simultaneously engaging with said cross bars for holding the bailagainst outward swinging movement during dumping of the container.

References Cited in the file of this patent UNITED STATES PATENTS2,702,142 Jones Feb. 15, 1955

